/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.geektimes.configuration.microprofile.config.source.spring;

import org.eclipse.microprofile.config.spi.ConfigSource;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.EnumerablePropertySource;
import org.springframework.core.env.Environment;
import org.springframework.core.env.MutablePropertySources;

import java.util.LinkedList;
import java.util.List;

import static java.util.Collections.unmodifiableList;

/**
 * {@link ConfigSource} Adapter
 *
 * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
 * @since 1.0.0
 * Date : 2021-04-17
 */
public class ConfigSourcesAdapter {

    public List<ConfigSource> getConfigSources(Environment environment) {
        List<ConfigSource> configSourcesList = new LinkedList<>();
        if (environment instanceof ConfigurableEnvironment) {
            ConfigurableEnvironment configurableEnvironment = (ConfigurableEnvironment) environment;
            MutablePropertySources propertySources = configurableEnvironment.getPropertySources();
            propertySources.stream()
                    .filter(propertySource -> propertySource instanceof EnumerablePropertySource)
                    .map(EnumerablePropertySource.class::cast)
                    .map(PropertySourceConfigSource::new)
                    .forEach(configSourcesList::add);
        }
        return unmodifiableList(configSourcesList);
    }
}
